CREEP DEFORMATION OF ENGINEERING ALLOYS - DEVELOPMENTS FROM PHYSICAL MODELING

Differences in the creep behaviour of particle-strengthened engineering alloys relative to simple solid solutions are reviewed and their implications for the mechanisms of high temperature deformation in these materials are considered. Constitutive equations describing the shapes of creep curves, based on physical models of the important types of damage are considered. These are incorporated in a computer software package, designated CRISPEN, that allows the analysis of creep data, the development of a detabase of model parameters and the simulation of the strain/time trajectory for arbitrary loading conditions. Examples of the application of CRISPEN to a range of alloys and loading conditions are described. © 1990, The Iron and Steel Institute of Japan. All rights reserved.